Exodus 4:15

Speak to him, and put my words in his mouth. And I will be in your mouth and in his mouth, and I will reveal to you what you must do

Other versions

King James Version

And thou shalt speak unto him, and put words in his mouth: and I will be with thy mouth, and with his mouth, and will teach you what ye shall do.

English Standard Version

You shall speak to him and put the words in his mouth, and I will be with your mouth and with his mouth and will teach you both what to do.

New International Version

You shall speak to him and put words in his mouth; I will help both of you speak and will teach you what to do.